Visualisation

These scripts produce publication-quality light-cone maps of galaxy redshift surveys. No summary statistic is measured; the scripts read FITS catalogues directly and render each galaxy’s position in one of two coordinate systems:

• Polar wedge — the classic “pizza slice” view, with comoving distance [Mpc] on the radial axis and right ascension on the angular axis. A thin declination strip is selected so that large-scale structure (filaments, walls, voids) is clearly visible.

• 3D comoving Cartesian — each galaxy is placed at its true comoving position \((x, y, z_\text{cart})\) in Mpc; a companion top-down projection is also written.

Both scripts share the same catalogue registry and quality-cut logic: valid RA ∈ [0°, 360°], DEC ∈ [−90°, +90°], redshift > 0, and ZWARNING = 0 where that column is present.

• 2D Light-cone Wedge Plot
• 3D Light-cone Visualisation